Rendering Pages Select Their Width

Context

Lists, designers and forms have different space requirements even within one product area.

Decision

Keep Full as the default and Standard as a centered column capped at eleven hundred pixels. Let the rendering page choose. Wide record and designer pages can fold the sidebar and restore it on departure.

Alternatives Considered

Area-wide or address-derived width would impose one layout on pages with different needs.

Consequences

Shared margins belong to PageLayout. Sidebar restoration follows the entry-state snapshot. The written fold cookie does not restore the preference on reload.